{"note":"bim_versions 導入後の保存のみ記録 (それ以前は bim_canonical 上書きで履歴なし)","ok":true,"slug":"u-theoldrectoryhouse-cei8abjg","versions":[{"created_at":"2026-06-13T19:45:34Z","element_count":90,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"310bb7e29781067119b323e8f60ad6981e72e570a745a80c72f1dbdf36663291","version":3},{"created_at":"2026-06-13T19:21:22Z","element_count":134,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"48ce1c1fd5547761cfdddd60c1ca575dc71433a71765507c692c43ed474ce42e","version":2},{"created_at":"2026-06-13T19:21:22Z","element_count":134,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}